Home / 21,230.64-29,297.65-12,155.70

Finding the Fourth Proportional to 21,230.64, 29,297.65 and 12,155.70

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Solution

The fourth proportional to 21,230.64, 29,297.65 and 12,155.70 is: 16,774.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.64 : 29,297.65 = 12,155.70 : x
  2. Step 2: Convert to fraction form
    21,230.64/29,297.65 = 12,155.70/x
  3. Step 3: Cross multiply
    21,230.64x = 29,297.65 × 12,155.70
  4. Step 4: Simplify right side
    21,230.64x = 356,133,444.11
  5. Step 5: Solve for x
    x = 356,133,444.11/21,230.64
  6. Step 6: Final answer
    x = 16,774.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.